TL;DR — Keep the suffix and separate the limits
For NOV 550T-7D, retain the full model designation and treat the brochure's flow and pressure ceilings as separate source statements until a configuration-specific performance chart establishes a shared operating point. The page reports up to 612 gallons per minute and up to 5,000 psi; it does not provide the speed, liner or power conditions for operating at both values together. Its dry weight includes the gear reducer. These are historical brochure statements, not approval for a particular installed pump. NOV source, PDF page 22, printed page 18.
Scope — Which pump and document does this cover?
This article covers the 550T-7D entry on PDF page 22 of NOV's Mission Drilling Solutions brochure, D352004107-MKT-001 Rev. 02, with a 2015 copyright on PDF page 24. The same page also describes JWS-400 in a separate column; its numbers do not belong to 550T-7D. The footer identifies the brochure as general information rather than a design document. Current revision and applicability to an installed unit remain unresolved. Source checked on October 13, 2026.
Does 550T-7 identify the same pump as 550T-7D?
That equivalence is unresolved. The manufacturer page uses 550T-7D, whereas this site's existing catalog uses the shorter 550T-7 label. A similar name or photograph does not establish a matching serial range, assembly revision or fluid-end configuration. Request the complete nameplate designation and the applicable manufacturer document before transferring any values between these labels.
For an evidence request, keep the customer's original label alongside the brochure model rather than silently deleting the D suffix. Model-directory navigation is available below; it is not a confirmation of model equivalence or component interchangeability.
Can the two ceilings be used as one operating point?
Not from this page alone. The 550T-7D paragraph gives two upper-limit statements, but no performance rows linking flow, pressure, speed, liner and power. It does not establish that the stated maximum flow and maximum working pressure occur together. The required next evidence is a performance chart or manufacturer confirmation tied to the unit's exact configuration.
Record a requested flow and pressure as a proposed duty point, then ask for its supporting chart row and conditions. Do not turn the brochure paragraph into a rated-duty table, infer speed or input power from the model name, or substitute an adjacent model's curve. This is a document-review method, not an operating instruction.
What does the dry-weight statement include?
The source reports a dry weight of 18,500 lb (8,392 kg), including the gear reducer. Preserve that inclusion when recording the value. The page also describes a triplex piston pump with a valve-over-valve fluid end and uses the wording 7-inch × 7-inch Stroke; it does not provide an installed unit's dimensional or lifting drawing. NOV source, PDF page 22.
A brochure dry weight does not establish the mass of a complete engine, transmission, skid, piping and liquid-filled package, nor does it define lifting points or transport dimensions. Obtain the unit-specific assembly drawing and mass statement for such work. This article supplies no lifting plan or installation approval.
Evidence table and document checklist
| Question | Source evidence | Further evidence needed |
|---|---|---|
| Full model identity | 550T-7D on PDF page 22 | Nameplate, serial range and applicable revision; 550T-7 equivalence remains unresolved |
| Flow and pressure | Separate up-to statements: 612 gallons per minute and 5,000 psi | Configuration-specific chart row connecting requested duty, speed, liner and power |
| Weight boundary | 18,500 lb (8,392 kg) dry, including gear reducer | Complete unit assembly and mass statement for transport or handling |
| Document status | Rev. 02, 2015 copyright; general information, not design | Current manufacturer document and installed-unit applicability |
- Record the full nameplate text and serial identification without normalizing away suffixes.
- Keep model-column, page and document revision references with each source value.
- Write the required flow and pressure together as the proposed duty; do not label it verified until its conditions are supported.
- List the installed pump, reducer, driver and package scope separately before comparing weight statements.
- Mark missing chart rows, drawings and model-equivalence evidence as unresolved rather than filling them with catalog assumptions.
FAQ
Is the D suffix optional in a technical record?
Keep the manufacturer's full 550T-7D designation. This source does not prove that the site's shorter 550T-7 label has identical configuration or performance.
Does the brochure confirm 612 gallons per minute at 5,000 psi?
No. It supplies separate upper-limit statements without a shared operating row. A configuration-specific performance chart or manufacturer confirmation is still required.
Does the listed dry weight cover the complete driven skid?
The stated dry weight includes the gear reducer. This page does not establish the weight of a complete driver, skid, piping and liquid-filled installation.
Can this document identify interchangeable spare parts?
No. A brochure model description does not establish individual part numbers, serial applicability or interchangeability. Request the applicable parts manual and assembly drawing.
Sources and related links
- NOV Mission Drilling Solutions brochure — PDF page 22, printed page 18: the 550T-7D column is the numerical and configuration source.
- NOV document footer — PDF page 24: revision, copyright and general-information boundary.
- Pump model directory: navigation only; shortened catalog labels require separate identity checks.
- JWS-400 pump and parts identification: a different model's identification workflow.
- JWS-340 pump and unitization scope: distinguishing a pump record from a package record.
Next step — Send the evidence for the proposed duty
Prepare the complete model and serial identification, proposed flow and pressure, installed configuration and applicable performance or parts documents. Use the technical inquiry contact to request document review. Missing operating-point, package or parts evidence remains unresolved; this article is for document review; specific configuration and commercial details require separate confirmation.